40 (knots per hour) = 46.031 mph
Yyyyyyyyy
10 Miles per Hour = 8.68976241900648 Knots
11 knots=12.6585739 miles per hour
21 knots=24.1663684 miles per hour
24 knots is about 27.6 miles per hour.
340 knots = 391.265 mph
482 Knots is about 554.78 miles per hour.
442 Knots is 508.6 miles per hour.
If you want the answer in miles per hour, 20 knots is 23.015589 miles per hour
47 kilometers per hour is 29.2 miles per hour.
21 knots is roughly 25 miles-per-hour.
40.28 miles per hour
About 195.6 miles per hour.